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ASoC: SOF: Intel: hda: enforce exclusion between HDaudio and SoundWire

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On some platforms with an external HDaudio codec, the DSDT reports the
presence of SoundWire devices. Pin-mux restrictions and board reworks
usually prevent coexistence between the two types of links, let's
prevent unnecessary operations from starting.

In the case of a single iDISP codec being detected, we still start the
links even if no SoundWire machine configuration was detected, so that
we can double-check what the hardware is and add the missing
configuration if applicable.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <bard.liao@intel.com>
Link: https://lore.kernel.org/r/20210726182855.179943-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2021-07-26 13:28:55 -05:00 committed by Mark Brown
parent 2635c22603
commit 61bef9e68d
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 12 additions and 0 deletions
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12
sound/soc/sof/intel/hda.c
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@ -187,12 +187,16 @@ static int hda_sdw_probe(struct snd_sof_dev *sdev)
int hda_sdw_startup(struct snd_sof_dev *sdev)
{
struct sof_intel_hda_dev *hdev;
struct snd_sof_pdata *pdata = sdev->pdata;
hdev = sdev->pdata->hw_pdata;
if (!hdev->sdw)
return 0;
if (pdata->machine && !pdata->machine->mach_params.link_mask)
return 0;
return sdw_intel_startup(hdev->sdw);
}
@ -1002,6 +1006,14 @@ static int hda_generic_machine_select(struct snd_sof_dev *sdev)
hda_mach->mach_params.dmic_num = dmic_num;
pdata->machine = hda_mach;
pdata->tplg_filename = tplg_filename;
if (codec_num == 2) {
/*
* Prevent SoundWire links from starting when an external
* HDaudio codec is used
*/
hda_mach->mach_params.link_mask = 0;
}
}
}